Troll Cross
An early amulet said to give protection against trolls, this cross was made of iron, a metal that further reinforced the aspect of safety since it is generally avoided by mischievous entities. The sign is not really a cross as we know it, rather a circle with a C-shaped base.
Nozedar Adele, The element encyclopaedia of secret signs and symbols, 2008, Troll Cross, p 222
thestrangemythworld 